package com.itheima.config;

import com.itheima.common.JacksonObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

@Slf4j
@Configuration
public class WebMVCConfig extends WebMvcConfigurationSupport {

    //配置静态资源映射
    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
        log.info("开启静态资源映射。。。");
        registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/backend/");
        registry.addResourceHandler("/front/**").addResourceLocations("classpath:/front/");
    }

    //扩展消息转换器
    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        log.info("扩展消息转换器...");
        //1.创建消息转换器
        MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();

        //2.设置具体的消息转换器
        converter.setObjectMapper(new JacksonObjectMapper());

        //3.将我们自定义的消息转换器放在前面使用
        converters.add(0,converter);
    }
}
